propane usage on pleasure way van

[lotus@7]

I know this is a how high is up question, but does anyone have any experience on how much propane a 2500 onan generator uses in an hour.. I have a new Pleasure Way Plateau TS and question if I can get 12 hours of driving with the generator running the AC and empty the tank... any users out there with info????

[wincrasher]

They quote .4 gallon per hour at 1/2 load. So I suspect AC running is alittle over that. I'd figure .5 to .75 gallons per hour.